definition

Under specified conditions, using a reference standard to assign values to the characteristics of measuring instruments including reference materials and determine their indication errors.

Purpose

1. Determine the indication error and whether it is within the expected tolerance range;
2. The reported deviation from the nominal value can be used to adjust the measuring instrument or correct the indicated value;
3. Assign values to any scale markings or determine other property values, and assign values to properties of reference materials;
4. Ensure that the value given by the measuring instrument is accurate and achieve traceability;
5. The basis for calibration is the calibration specification or calibration method, which can be uniformly stipulated or independently formulated;
6. Calibration is the performance of a predefined process under specified conditions to determine the relationship between known input values and output values.